Improvement in carpet-sweepers



G. W. D. MEDBURY.

CARPET-SWEEPER.

No.185,865 Patented Jan. 2, 1877.

INVENTUR N. PETERS PHOTD-LITMDGRAFHER. WASH'NGTON. D C

UNITED STATES PATENT OFFICE.

GEORGE W. D. MEDBURY, OF PROVIDENGE, RHODE ISLAND.

IMPROVEMENT IN CARPET-SWEEPERS.

specifieation forming part of Letters Patent No. 185.865, dated January2, 1877 application filed June 13, 1876.

To all whom it may concew:

Be it known that I, GEORGE W. D. MED- BURY, of the city of Providence,county of Providence,'and State of Rhode Island, have invented new anduseful Iup'rovements in Carpet-Sweepers; and I hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawiugs, forming part of thisspecifioation.

Figure 1 is a perspective view of one end of my improved carpet-sweeper,the top-being shown as open, and part ot' the box as broken away to showthe driving-disk and the journal-bearing of the brush-cylinder. Fig. 2is a cross-section of the oarpet-sweeper, showing the driviug-diskrougheued on its edge, and provided With internal cogged gear, as alsothe intermediate gear and the gear secured to the revolvingbrush-cylinder.

The iuventiou consists in the arraugenet of the driving-disk, providedwith a scalloped or roughened edge, and with au internal oogged gear, bywhich motion is imparted through the stationary intermediate pinion to apinion secured to the revolviug brush, and thus the driving-disk, whenthe carpet-sweeper is pushed over the carpet, imparts a rapid rotarymotion to the brush.

Iu the drawings, Ais the box or case of the carpet-sweeper, providedwith the dust-receivers and revolving brush. B is the revolving brush. Gis the journal-hearing for the revolving brush. a is the driving-disk,arrauged to exteud below the box A sufficieut to insure contact with thecarpet, and to prevent slippiug the edge of the disk a, is scalloped orotherwise roughened, so as to in'sure its rotation. The driviug-disk ais also pro vded with an internal cogged gear, by which the rotativemotion is communicated to the pinion b, secured to the shaft of therevolving brush by means of the pinion c, which pinion revolves on astud or piu projecting from the arm d, and is held in position bysecuring the arm d to the box A.

By this arrangemeut a positive motion is imparted to the revolvingbrush, which will revolve with three times the velocity with which thedriving-disk revolves, and thus iusure a thorough brushiu g ot' thecarpet.

When in a carpetsweeper the brush is driven by frictional contact, or bybands, such friction-gears and bands will soon wear, and the brush willnot revolve with the required speed, the carpet will not be thoroughlycleaned, and the sweeper soon set aside as a useless machine.

In my improved carpetsweeper the brush is revolved by positive gears ata given speed, and these gears, being strong and not liable to slip,insure such speed in t'e revolviug brush as will thoroughly clean thecarpet.

The driving inechanisu is not oostly, is simple in construction, notliable to slip, and can be replaced when worn at a small cost and withlittle labor.

Having thus described my inveutiou, I claim as new and desire to secureby Letters Patent- In a carpet-sweeper, the combination, with therevolving brush B, ot' the traction wheel or disk a loose on the shaftof the brush, and provided with the internal eogged gear, the pinion b,secured to the brush, and the intermediate pinion c, arranged to'inpartrotative motion to the brush, substantially as and for the purposespecified.

G. W. D. MEDBURY.

Witnesses:

J OSEPH A. MILLER, AMos A. WE'rE.

